Boot and shoe sewing machine



(No Model.)

0. BROWN.

BOOT AND SHOE SEWING MAGHINE- 2 Sheets-Sheet; 1.

1m 272409 Patented.Feb. 20,1883

IMIIHIHIH' $19.14.

Wiimsses;

N. PETERS. mutmn mr, v'v-min m. n c.

(No Model.) 2 Sheets-Sheet 2-.

O. BROWN.

BOOT AND SHOE SEWING MACHINE- Patented-Febq20,1883;

l x l UNITED STATES PATENT OFFICE.

CHARLES BROWN, OF LYNN, MASSACHUSETTS, ASSIGNOR TO THE AMERICAN STAPLESEWING MACHINE COMPANY, OF PUTNAM, CONNECTICUT.

BOOT AND SHOE SEWING. MACHINE.

SPECIFICATION forming part of Letters Patent No. 272,409, dated February20, 1883.

Application filed November 20, 1882. (No model.)

To. all whom it may concern Be it known that I, CHARLES BROWN, of Lynn,in the county of Essex and State of Massachusetts, have invented certainnew and useful Improvements in Sewing-Machines,of which the following,taken in connection with the accompanying drawings, is a specification.

My invention relates to that class of waxthread sewing-machines whichare used for sewing the soles to the uppers of boots and shoes, andespecially to'the mechanism for feeding the sole and for operating andcontrolling the movements of the needle, and is an improvement upon themachines described [5 in Letters Patent No. 187,874., granted to A.

Leavitt and H. L. Drew, February 27, 1877, and reissue No. 9,698,granted to S. Sawyer and William Esty, May 10,1881, original No.174,159, dated February 29, 1876.

My invention consists in certain novel arran gements and combinationsofdevices, which will be readily understood by reference to thedescription of the drawings, and the claims to be hereinafter given. I.

Figure 1 of the drawings is a sectional side elevation of a machineembodying my invention. Fig. 2 is a front elevation of the working partsof the machine that are above the work, with the carrying-plate on whichmost 0 of said parts are mounted. Fig. 3 is a rear elevation of the sameparts, except the cam and large gear-wheel. Fig.4 is a horizontalsection on line 00 ac on Figs. 2 and 3. Fig. 5 is afront elevation ofthe feed-cam. Fig. 6 is a section of the same on line 2 2 on Fig. 5.Fig. 7 is a plan of the intermittently-acting bevel-pinion for rotatingthe needle. Fig. Sis a partial vertical section of the mechanism forregulating the stroke of the needle. Fig. 9 is a plan of .to the devicefor tripping the pawl of the needleregulating mechanism. Fig. 10 is aside elevation of the feed-point, presser-foot, and a portion of thefeed-bar; Fig. 11 is a vertical section on line 1: c on Fig. 10. Fig. 12is a sec- 5 tion on line yy on Fig. 2, and Figs. 13, and 14.

are respectivelyafrontelevation and edge view of the bevel-gear wheelfor intermittently rotatin g the needle. 7

A is the main frame or standard of the machine, mounted upon the legs B,and having mounted in suitable bearin gs thereon the driving-shaft C,the vertical shaft D,and the camshaft E, connected together by suitablegearing, all constructed, arranged, and operating in the same manner asdescribed in the before- 5 5 cited patent to Sawyer and Esty.

F is the work-supporting horn, carrying in its tip the whirl'a, andhaving mounted therein the inclined shafts b and b and the verticaltubular shaft 0. connected together and to the driving-shaft C bygearing, and operating in the same manner as in said patent to Sawyerand Esty. i G is a frame detachably secured to the front of the upperportion of theframeA,and having mounted thereon the needle-bar (l, thepresserfoot bar 6, the presser-footlifter f, and the feedlever g. Theneedle-bar dis fitted to a bearing in the rectangular sleeve H in such amanner thatit may be revolved therein, but cannot be moved endwiseexcept in unison with said sleeve, and carries in its lower end thebarbed needle h.

So far the construction and arrangement of the needle and needle-bar arethe same as described in the patent to Sawyer and 'Esty, before cited,and the manner of reciprocating it and regulating its stroke accordingto the thickness of the sole being sewed is the same as describedin thepatent to Leavitt and Drew, before cited,excepting an improvement-in thetripping device for disengaging the pawl from the regulating-bolt, thenovel features of which will be hereinafter explained.

The rectangular sleeve H has secured there- 8 5 to, by means of theclamp H, the pin h,which projects at right angles thereto and into theslot '5 in the vertically-reciprocating bar I, located just in front ofand parallel to the needle-bar, and having its bearing in the stand or 0bracket 1, extending across and bolted to the frame G, as shown in Fig.2. The bar I has set in its front side the pin j, which receives thelower end of the connecting-rod J, the up per end of which embraces thecrank-pin k, set in the crank K, secured upon the front end of thecam-shaft E. The lower end of the bar I has fitted thereto the bolt 1,having formed uponone side thereof a series of ratchet-teeth to engagewith the pawl m to hold said boltin 10c any desired position during theupward movement of the bar I. The bolt 1 is forced downward, when thepawl on is disengaged there from, by the tension of a coiled springsurrounding said bolt, as shown in Fig. 8, and is limited in itsdownward movement relative to the bar I by the stop a, which is securedto the bar I and projects into the slot 0 in the lower end of the bolt1, as shown in Figs. 2 and S.

L is a bracket secured to and moving with the presser-foot bar 0, theouter end of said bracket being directly beneath the lower end of thebolt 1, in position to be struck by it when the bar I descends, and stopthe downward movement of the bolt while the bar 1 and the pawl mcontinue to move downward, and there by force the upper end of the boltZ farther into the slot 1', in which position the pawl m retains ituntil the barI and needle-bar d have completed their upward stroke.

So far the parts described are constructed, arranged, and operatesubstantially as described in one or both of the before-cited patents,and are not of my invention.

The upper end of the needle-bar d is fitted to move endwise in and becompelled to revolve with the sleeve M, mounted in a bearing in theupper bar of the frame G, so as to be free to revolve therein andprevented from moving endwise thereby, and has secured to its upper endthe bevel pinion N, having formed thereon two series of gear-teetharranged upou opposite sides thereof and separated by two fiat planes,0, also opposite to each and tangent to the pitch-circle at the pointsequidistant between the two series of teeth, and also having set in itshub two pins, 0", opposite to each other, and with one of the sides ofeach in radial line, or nearly so, with the side of one of the endspaces of the series of teeth, as shown in Fig. 7.

O is a bevel-gear wheel mounted upon the cam-shaft E, and provided withtwo series of teeth arranged opposite to each other, and each consistingof as many teeth as there are spaces between the teeth of each series onthe pinion N. The two portions of the wheel 0 which lie between the twoseries of teeth are turned to the same bevel as the teeth and to thesame diameter as the pitch-circle, with the corners contiguous to thefirst space upon either side of each series of teeth rounded, as shownin Figs. 13 and 14. The wheel 0 also has setin its edge two pins, 1) p,opposite to each other, and in such positions relative to the two seriesof teeth formed thereon that said pins shall each engage with one of thepins 0 set in the pinion N, at the right time to insure the rotation ofsaid pinion and the engagement of the first tooth of a series on thewheel 0 with the first space in a series of teeth on the pinion N. Bythis construction and arrangement of the pinion N and wheel 0 eachrevolution of the shaft E will cause two semi-rotations of theneedle-bar in the same direction, with a period of rest or standstillbetween said semi-rotations equal in duration to about twice the timeoccupied in making each semi-rotation. This method of imparting to theneedle its intermittent semi-rotations is a great improvement upon themeans employed in the machine described in the patentto Sawyer and Esty,before cited, for the reason that the rotary movement of the needle-baris reduced one-half by doing away with the backward rotation, and forthe reason that the plate K of said patent to Sawyer and Esty isdispensed with, thus very materially reducing the power required tooperate the machine and causing the machine to run very much stiller.

The presser-foot P is adjustably secured to the angular lip e,projecting from the lower end of the presser-bar e, by means of the bolt0 which passes through a slot in said lip, as shown in Fig.11.Thepresser-bar e is mounted in hearings in the frame G in a verticalposition in such a manner that it may he moved vertically therein, andis prevented from rotating in said bearings by its lower portion beingmade rectangular in cross-section and fitted to a bearing ofcorresponding shape. The presser-foot P has secured to each side thereofa plate, q, in each of which is formed a curved inclined slot, q, toreceive the fulcrum-pin 1', upon which is mounted the feedpoint lever Q,the lower end of which is provided with the steel feed-point 1", and theupper end of which extends upward into a slot formed in the rectangularportion of the bar 6, between the bottom of said slot and the pin 3,against which the upper end of said lever is pressed by the spring 8,secured to the bar a, as shown in Fig. 11.

To the pin r is pivoted one end of the forked link It, the opposite endof which is adjustably pivoted to the lower end of the lever g by meansof the bolt t, which passes through the curved slot t in said lever, andthe thumbnut H, as shown in Figs. 2 and 12. The lever r is fulcrumed atg, and carries at its upper end a truck or stud, which fits into and isacted upon by the path a of the cam T, to impart thereto a vibratorymotion about its fulcrum g for the purpose of operating the feed-pointlever. That portion T of the cam T which causes the feeding of thematerial is made adjustable upon the main portions of the cam by meansof the bolts uu passing through slots in the main body of the cam T andscrewing into the section T, as shown in Figs. 5 and 6, for the purposeof varying the throw of the feed-point. Another means of varying thefeed is by moving the link R toward or from the fulcrum g of the lever gby means of the bolt t and nut 6 Upon the upper side of the lower bar ofthe frame G, and in front of the needle and presser bars, is mounted, soas to be movable endwise thereon, the bar to, provided with the arm to,the upper end of which is pivoted to the lever g, and with the lateralprojection to, in

which is adj ustably secured the screw stop or trip 20 the object ofwhich is to trip the pawl m when the bar I descends.

The construction, arrangement, and mode of operating the feed mechanismand tripping the pawl m are great improvements upon the devicesdescribed in the patents to Sawyer and Esty and Leavitt and Drew, beforecited, in that very much less weight has to be moved and the motions ofoperating parts are more generally continuous in the same direction,instead of having to be started from a state of rest, moved in onedirection, brought to a standstill, and then moved in the oppositedirection, as was the case with the reciprocating plate which rotatedthe needle and operated the feed-point in the Sawyer and Esty machine,and performed the same operations and tripped the pawl of theneedle-lifting mechanism in the Leavitt and Drew machine.

The presser-bar eis forced downward by the spring 0 surrounding said barbetween its upper bearing and the collar 0, and is raised for thepurpose of placing the work upon the horn and beneath the presser-foot Pby means of the hand-leverf, theinner end of which engages with theunder side of the collar e, the outer end of said lever being held up,when .not depressed by the hand of the operator, by

means of the springf. The presser-bar 0 projects above its upperbearing, and has loosely fitted thereto, so as to be free to move up anddown thereon, the arm U, which carries a pawl (notshown) to engage withratchet-teeth formed in the side of the bar 6, said pawl being actedupon by a cam on the shaft E, and the arm U being forced downward by thespring o all these parts being constructed, arranged, and operatedsubstantially as shown and described in the patent to Sawyer and Esty,before cited, and forming no part of my present invention. The tensionof the spring c is regulated by means of the nutsf and f in a well-knownmanner. .The line 2 2 in Figs. 2 and 3 indicates the level of thatop ofthe work-supporting horn F.

W hat I claim as new, and desire to secure by Letters Patent of theUnited States, is-

1. In combination with the needle-bar of a sewing-machine, the sleeve M,connected with said needle-bar so as to compel it to revolve therewithwhile it is free to be reciprocated therein, segmentally-toothedgear-wheels arranged and adapted to impart to said needlebar a series ofsemi-rotations inthe same direction at regular and equal intervals, witha defined and predetermined period of rest after each semi-rotation,substantially as described.

2. In combination with the reciprocating needle-bar of a sewing-machine,the sleeve M, the bevel-pinion N, provided with two series of teeth andtwo flat planes between them, and 1 the pins c 0 and the bevel-wheel 0,provided with two series of teeth, two smooth surfaces connecting saidseries of teeth, and the pins 19 19, all constructed, arranged, andadapted to operate substantially as and for the purposes described.

3. The feed-point lever Q, pivoted upon the movable fulcrum-pin r, incombination with presser-bar e, the pin 8, and spring s, all arrangedand adapted to operate substantially as described.

4. The combination of the slotted presserbar 6, the presser-foot P, theslotted plates q q,

.the feed-point lever Q. the movable fulcrumpin-r, pin .9, spring .9,forked link It, the lever g, and the cam T, all constructed, arranged,and adapted to operate substantially as and for the purposes described.

5. The combination of the presser-bar e, the feed-point lever Q, mountedupon a movable fulcrum-pin, the pin 8, the springs,the forked link R,the lever g, and the cam T, provided with the adjustable section T,substantially as described.

6. In combination with the vertically-reciprocating bar I, movable boltl, pawl m, and stopbracket L, the sliding bar to, the adjustablestop-screw 10 the leverg, and the cam T, substantially as described.

In testimony whereof I have signed my natne to this specification, inthe presence of two subscribing witnesses, on this 8th day of November,A. D. 1882.

CHARLES BROWN.

\Vitnesses: 4

E. A. HEMMENWAY, WALTER. E. LOIVIBARD.

